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Chapter 2 Vocab Crossword

Across
Replaceable resource.
Layer of gases surrounding our planet.
Organization of Petroleum Exporting Countries.
Potential energy locked within a substance.
Visible to the eye.
Energy source that will never run out.
Contaminated by by-products of combustion.
Energy in motion.
Measure of unavailable energy in a closed system.
The use of energy resources.
Down
Nonreplaceable resource.
Basic unit of heat energy.
Changing one form to another form.
Making better use of energy.
Increase in the earth's atmosphere temperature.
Produced by mechanical devices.
The extent to which an energy form is usefully converted into another form of energy.
Longer wavelength than light energy.
Associated with electrons.
100,000 Btu.
Energy waiting to happen.
Abbreviation for 1 quadrillion Btu.
The atom.
Restriction of trade.